ceph/src/boost/boost/spirit/home/qi/operator/not_predicate.hpp

   1 /*=============================================================================
   2     Copyright (c) 2001-2011 Joel de Guzman
   3
   4     Distributed under the Boost Software License, Version 1.0. (See accompanying
   5     file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   6 =============================================================================*/
   7 #ifndef BOOST_SPIRIT_QI_OPERATOR_NOT_PREDICATE_HPP
   8 #define BOOST_SPIRIT_QI_OPERATOR_NOT_PREDICATE_HPP
   9
  10 #if defined(_MSC_VER)
  11 #pragma once
  12 #endif
  13
  14 #include <boost/spirit/home/qi/domain.hpp>
  15 #include <boost/spirit/home/qi/meta_compiler.hpp>
  16 #include <boost/spirit/home/qi/parser.hpp>
  17 #include <boost/spirit/home/qi/detail/attributes.hpp>
  18 #include <boost/spirit/home/support/has_semantic_action.hpp>
  19 #include <boost/spirit/home/support/handles_container.hpp>
  20 #include <boost/spirit/home/support/info.hpp>
  21 #include <boost/proto/operators.hpp>
  22 #include <boost/proto/tags.hpp>
  23
  24 namespace boost { namespace spirit
  25 {
  26     ///////////////////////////////////////////////////////////////////////////
  27     // Enablers
  28     ///////////////////////////////////////////////////////////////////////////
  29     template <>
  30     struct use_operator<qi::domain, proto::tag::logical_not> // enables !p
  31       : mpl::true_ {};
  32 }}
  33
  34 namespace boost { namespace spirit { namespace qi
  35 {
  36     template <typename Subject>
  37     struct not_predicate : unary_parser<not_predicate<Subject> >
  38     {
  39         typedef Subject subject_type;
  40
  41         template <typename Context, typename Iterator>
  42         struct attribute
  43         {
  44             typedef unused_type type;
  45         };
  46
  47         not_predicate(Subject const& subject_)
  48           : subject(subject_) {}
  49
  50         template <typename Iterator, typename Context
  51           , typename Skipper, typename Attribute>
  52         bool parse(Iterator& first, Iterator const& last
  53           , Context& context, Skipper const& skipper
  54           , Attribute& /*attr*/) const
  55         {
  56             Iterator i = first;
  57             return !subject.parse(i, last, context, skipper, unused);
  58         }
  59
  60         template <typename Context>
  61         info what(Context& context) const
  62         {
  63             return info("not-predicate", subject.what(context));
  64         }
  65
  66         Subject subject;
  67     };
  68
  69     ///////////////////////////////////////////////////////////////////////////
  70     // Parser generators: make_xxx function (objects)
  71     ///////////////////////////////////////////////////////////////////////////
  72     template <typename Elements, typename Modifiers>
  73     struct make_composite<proto::tag::logical_not, Elements, Modifiers>
  74       : make_unary_composite<Elements, not_predicate>
  75     {};
  76 }}}
  77
  78 namespace boost { namespace spirit { namespace traits
  79 {
  80     ///////////////////////////////////////////////////////////////////////////
  81     template <typename Subject>
  82     struct has_semantic_action<qi::not_predicate<Subject> >
  83       : unary_has_semantic_action<Subject> {};
  84
  85     ///////////////////////////////////////////////////////////////////////////
  86     template <typename Subject, typename Attribute, typename Context
  87         , typename Iterator>
  88     struct handles_container<qi::not_predicate<Subject>, Attribute
  89         , Context, Iterator>
  90       : unary_handles_container<Subject, Attribute, Context, Iterator> {};
  91 }}}
  92
  93 #endif